However, Andromeda would be the last character Gillis added to The Defenders, since shortly after her debut he was told that the series was being cancelled.

[1] A member of the Homo mermanus race, Andromeda is the illegitimate daughter of Attuma of Atlantis by a woman named Lady Gelva.

[5] Andromeda was raised in Atlantean society and trained in the arts of hunting and war and she exceeded any other male except for her father in these skills.

[6] Andromeda, inspired by Namor's tales, moved to the surface world, where she used a serum to give herself a human appearance and the ability to breathe out of water.

[7] When she was revealed as an Atlantean, she quickly abandoned her charade and became a member of the Defenders, joining them against a villain named Hotspur.

Andromeda sacrificed her life force, joining with Manslaughter, the Valkyrie, and the Interloper to drive the Dragon of the Moon from the Earth, and her body was turned to stone.

[20] As a member of the Homo Mermanus race, Andromeda can breathe underwater, and has more durable skin which allows her to survive in great depths.

To counteract this, Andromeda uses a serum that allows her people to survive up to 12 hours out of the water, and in addition, provides her with the skin color of a surface-dweller.